Home / 1,292.45-1,938.96-426.75

Finding the Fourth Proportional to 1,292.45, 1,938.96 and 426.75

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Solution

The fourth proportional to 1,292.45, 1,938.96 and 426.75 is: 640.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.45 : 1,938.96 = 426.75 : x
  2. Step 2: Convert to fraction form
    1,292.45/1,938.96 = 426.75/x
  3. Step 3: Cross multiply
    1,292.45x = 1,938.96 × 426.75
  4. Step 4: Simplify right side
    1,292.45x = 827,451.18
  5. Step 5: Solve for x
    x = 827,451.18/1,292.45
  6. Step 6: Final answer
    x = 640.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.